| Riboflavin (mM) | No. of trials | Average Corr. (R2) | Standard dev. (s) | Significance (95%) |
| 33.22 | 3 | 0.9967 | 3.35 × 10−3 | None |
| 4.15 | 3 | 0.9993 | 9.74 × 10−4 | None |
| 0.52 | 4 | 0.9976 | 1.37 × 10−3 | None |
| 0.028 | 4 | 0.9986 | 1.28 × 10−3 | N/A |